The diagram below shows the specific parts of the sensor. Read further to explore the functionality of each part of the sensor.

  1. Alignment mount adaptor
  2. Support rod threaded mounting insert
  3. Infrared emitter and receiver
  4. Status indicators
  5. On/Off switch & Reset
  6. USB port
  7. Unique ID number

Alignment mount adaptor (1)

This adapter is used to align drops from the reagent reservoir into the sensor’s light beam. 

Support rod threaded mounting insert (2)

This support rod can be screwed into the mounting threads, which are found at the base and sides of the Sensor. The rod can be used for clamping into a suitable holding device.

Infrared emitter and receiver (3)

This is where the infra-red beam goes from one side to the other.

The Status Indicators (4)

The sensor features a single status indicator that changes colour and flashes. See the table below for further information.

Status Light


No light

Sensor is Off. Short press the On/Off switch

Blue flashing

Sensor is On and Bluetooth advertising

White flashing

Charging via USB mains charger or USB port,

Sensor is On and Bluetooth advertising

Red, Green, Blue Flashing

Charging via USB mains charger or USB port,

Sensor is Off

Green flashing

Communication with the EasySense2 app (via USB or Bluetooth) has been established

Solid Green

Fully charged

Orange flashing

Recording data

Red flashing

Battery is low

On/Off & Reset Switch (5)

The sensor's on/off switch allows you to turn the sensor on, off or perform a hard reset.

To switch the sensor off

  • Press and hold down the On/Off switch until the white light shows, then release.
  • If not communicating with the EasySense2 app, the sensor will turn off after a period of one hour of inactivity. 

Hard resetting the sensor

  • If necessary, attach the sensor to power.
  • Press and hold down the On/Off button for at least 8 seconds until the status LED gives a flash of blue light, then release.
  • If the sensor fails to respond, contact Product Support at Data Harvest. Please provide details of:  
    • The computer platform it is being used with and the EasySense2 app’s version number.
    • A description of the problem being encountered. 

Zero count volume

  • A short press of the button will reset the count/volume to zero.

USB Port (6)

Use to connect to a computer or a charging unit.

For specific USB or Bluetooth connectivity instructions, please see the 'Connectivity' section of this documentation. 

For instructions on charging your device, see the section on 'Charging the Sensor'. 

Unique ID Number (7)

All Smart Wireless Sensors are labelled with a unique ID number. This number is used in the EasySense2 app, so that you can identify each sensor when making a connection wirelessly.